Comment 11 for bug 595551

Here is my experience with the problem, using the Lightning 0.3.1 release and Thunderbird 2 beta 2.

To reproduce:

1) In Lightning, "delete" all of your remote calendars of the relevant webdav server.

2) In "Thunderbird > Tools > Options > Privacy > Passwords > Edit Saved Passwords", remove each entry for this webdav server.

3) Restart Thunderbird.

4) In Lightning, "create" a new webdav calendar. In my case, the webdav server is "dav.messagingengine.com", and for privacy I'll pretend that my username is "<email address hidden>". So, I specify the Location URL as: https://<email address hidden>@dav.messagingengine.com/user1.fastmail.fm/files/calendars/Pete.ics

I'm then prompted to "Enter username and password for "dav.messagingengine.com" at "https://dav.messagingengine.com"", which I do (and also tell Password Manager to remember it).

5) Repeat step (4), but replace all occurrences of "user1" with "user2", and change "Pete.ics" with "SomeoneElse.ics". When prompted, enter the username and password for 'SomeoneElse'.

In Lightning, you now see events from both users' remote calendars. Perfect.

In signons.txt, you now see:

dav.messagingengine.com:443 (dav.messagingengine.com)
\=username=\
<encrypted>
*\=password=\
<encrypted>
.
dav.messagingengine.com:443 (dav.messagingengine.com)
\=username=\
<encrypted>
*\=password=\
<encrypted>
.

6) Here's the problem. Restart Thunderbird and you're prompted with, "Select a username to be entered on this form." The choices are:

<email address hidden>
<email address hidden>

I choose user1 and click OK. Now I get a second dialog with user1's username and password pre-filled, and the following checkbox is checked: "Use Password Manager to remember these values". I click OK and then see user1's events on the calendar, but not user2's events.

Every time that I restart Thunderbird, I have to follow the steps in (6). I can choose to see either user1's events or user2's events, but never both at the same time. All of the necessary usernames and passwords are saved in Password Manager, but apparently only one set can be used at a time. It seems that Password Manager works on a per-domain basis, and ignores everything else in URLs.

Ideally, I would not see *any* prompts for usernames or passwords when I restart Thunderbird, and Lightning would automatically load all remote calendars for all users.